CN106100378A - A kind of wide scope input, the flyback power supply of Multiple isolated outputs - Google Patents
A kind of wide scope input, the flyback power supply of Multiple isolated outputs Download PDFInfo
- Publication number
- CN106100378A CN106100378A CN201610551674.XA CN201610551674A CN106100378A CN 106100378 A CN106100378 A CN 106100378A CN 201610551674 A CN201610551674 A CN 201610551674A CN 106100378 A CN106100378 A CN 106100378A
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- Prior art keywords
- circuit
- output
- power supply
- input
- high frequency
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of wide scope input, the flyback power supply of Multiple isolated outputs, this flyback power supply at least includes: high frequency transformer, rectifying and wave-filtering input circuit, switching tube circuit, output feedback circuit, control and protection circuit, first output circuit and the second output circuit, described rectifying and wave-filtering input circuit is connected with high frequency transformer inlet circuit by switching tube circuit, described high frequency transformer two outfan respectively with the first output circuit, second output circuit connects, described second output circuit is by output feedback circuit, control to be connected with switching tube circuit with protection circuit.The present invention is only controlled with a MIP0040MS chip, it is not necessary to other chip；Adapt to the wide-range input voltage of real-time change, can be used in the commercial Application of complexity as accessory power supply；Multiple-channel output；Each road exports, input is mutually isolated with outlet chamber.
Description
Technical field
The present invention relates to a kind of power circuit, be specifically related to a kind of wide scope input, the inverse-excitation type electricity of Multiple isolated outputs
Source.
Background technology
Using the multiple-output electric power of inverse-excitation type principle, its simple in construction, volume are little, low cost, use in middle low-power
In environment, tool is widely used.But, this kind of power supply with Multiple isolated outputs often can only operate in the input electricity of regulation
Pressure, if voltage deviation rated value is relatively big, then cannot normally work；And the power supply that can be operated in wide input voltage range is past
Toward the output of only single channel.Obviously, a kind of power supply that can overcome the problems referred to above is needed to meet answering under complex environment situation
With.
Summary of the invention
Present invention aims to the deficiencies in the prior art, it is provided that it is real that one can be operated in input voltage width scope
Shi Bianhua, multichannel stablize the flyback power supply of isolation and amplifier.
For reaching above-mentioned purpose, the technical solution used in the present invention is:
A kind of wide scope input, the flyback power supply of Multiple isolated outputs, this flyback power supply at least includes:
High frequency transformer, rectifying and wave-filtering input circuit, switching tube circuit, output feedback circuit, control and protection circuit, first defeated
Going out circuit and the second output circuit, described rectifying and wave-filtering input circuit is by switching tube circuit and high frequency transformer inlet circuit
Connecting, described high frequency transformer two outfan is connected with the first output circuit, the second output circuit respectively, described second output electricity
Road is connected with switching tube circuit with protection circuit by output feedback circuit, control.
Further, described high frequency transformer has input winding, the first output winding, the second output winding, auxiliary confession
Electricity winding；
Described rectifying and wave-filtering input circuit has input filter device and full-bridge rectifier filter device；
Described switching tube circuit has DCR absorption circuit and metal-oxide-semiconductor drive circuit；
Described output feedback circuit has voltage references and light-coupled isolation feedback device；
Described control and protection circuit have power supply control chip, over-current detection circuit；
Described first output circuit has the first current rectifying and wave filtering circuit, the first absorption circuit；
Described second output circuit has the second current rectifying and wave filtering circuit, the second absorption circuit.
Further, described rectifying and wave-filtering input circuit and described switching tube circuit connect and compose series circuit to described height
The input winding power energy storage of frequency power transformer.
Further, the voltage references of described output feedback circuit be TL431, light-coupled isolation feedback device be
TLP781。
Further, described control is MIP0040MS with the power supply control chip of protection circuit, described over-current detection circuit
By sampling resistor, described high frequency transformer input winding current signal is transferred to described power supply control chip.
Further, described first output circuit exports winding with described high frequency transformer first and is connected.
Further, described second output circuit feeds back with the second output winding and the described output of described high frequency transformer
Circuit connects.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention is only controlled with a MIP0040MS chip, it is not necessary to other chip, reduces circuit cost and complicated journey
Degree；
It is adapted to the wide-range input voltage of real-time change, various occasion can be flexibly applied to；
Multiple-channel output, between inputting and exporting, each road output between mutually isolated.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of the embodiment of the present invention；
Fig. 2 is the circuit theory diagrams of the embodiment of the present invention；
Fig. 3 is waveform during embodiment of the present invention steady operation.
Detailed description of the invention
Being described in further detail the purpose of the present invention below by specific embodiment, embodiment can not at this one by one
Repeat, but the most therefore embodiments of the present invention are defined in following example.
As it is shown in figure 1, a kind of wide scope input, the flyback power supply of Multiple isolated outputs, this flyback power supply at least wraps
Include:
High frequency transformer, rectifying and wave-filtering input circuit, switching tube circuit, output feedback circuit, control and protection circuit, first defeated
Going out circuit and the second output circuit, described rectifying and wave-filtering input circuit is by switching tube circuit and high frequency transformer inlet circuit
Connecting, described high frequency transformer two outfan is connected with the first output circuit, the second output circuit respectively, described second output electricity
Road is connected with switching tube circuit with protection circuit by output feedback circuit, control.
Described high frequency transformer, has input winding, the first output winding, the second output winding, auxiliary power supply winding；
Described rectifying and wave-filtering input circuit has input filter device and full-bridge rectifier filter device, for AC-DC converter；
Described switching tube circuit has DCR absorption circuit and metal-oxide-semiconductor drive circuit, be used for controlling the input of described high frequency transformer around
Group energy input；
Described output feedback circuit has voltage references and light-coupled isolation feedback device, for feedback control and stably export electricity
Pressure；
Described control and protection circuit have power supply control chip, over-current detection circuit, normally work for regulating circuit；
Described first output circuit has the first current rectifying and wave filtering circuit, the first absorption circuit, exports for first via electric energy；
Described second output circuit has the second current rectifying and wave filtering circuit, the second absorption circuit, for the second road electric energy output.
Described rectifying and wave-filtering input circuit and described switching tube circuit connect and compose series circuit to described high frequency transformer
Input winding power energy storage.
The voltage references of described output feedback circuit is TL431, light-coupled isolation feedback device is TLP781.
Described control is MIP0040MS with the power supply control chip of protection circuit, and described over-current detection circuit is by sampling
Described high frequency transformer input winding current signal is transferred to described power supply control chip by resistance.
Described first output circuit exports winding with described high frequency transformer first and is connected.
Described second output circuit is connected with the second of described high frequency transformer the output winding and described output feedback circuit.
Understanding to make the present invention become apparent from, below in conjunction with Fig. 2, the invention will be further described.
As in figure 2 it is shown, the input of rectifying and wave-filtering input circuit is through 2 electric fuses, by a common mode filtering inductance LIN
The full-bridge rectification filter circuit being made up of tetra-diodes of D1, D2, D3, D4 and electric capacity CIN is accessed with two X electric capacity CX1, CX2.
In switching tube circuit, resonant capacitance CDS is in parallel with D, S the two poles of the earth of metal-oxide-semiconductor；It is defeated that metal-oxide-semiconductor D pole meets high frequency transformer T1
Entering Motor Winding Same Name of Ends, G pole connects the drive circuit that constitute in parallel with RGT2 again after being connected by RGT1, DGT, and S pole is connect by resistance Rs
Primary ground.
In output feedback circuit, optocoupler former limit anode connects electric capacity COUT2 positive pole by resistance RPC, and optocoupler former limit negative electrode leads to
Cross resistance Rb and connect electric capacity COUT2 positive pole；Three-terminal voltage-stabilizing pipe SNT negative electrode connects optocoupler former limit negative electrode, and anode connects the 2nd GND end, reference
Pole connects the second end by resistance ROUT1；Reference resistance Rref is connected in parallel on the anode of SNT and with reference between pole；Resistance RCR and electric capacity
The negative electrode of SNT it is attempted by and with reference between pole after CCR series connection；The auxiliary power supply Motor Winding Same Name of Ends of high frequency transformer T1 passes through two poles
Pipe DVCC connects optical coupling secondary edges colelctor electrode；Between electric capacity CVCC1, CVCC2 parallel diode DVCC negative electrode and primary ground；Emitter-base bandgap grading passes through
Resistance RVDD1, electric capacity CVDD1 series connection primary ground；Resistance RVDD2 and electric capacity CVDD2 is in parallel with electric capacity CVDD1 after connecting to be connected
Connect；The primary ground of auxiliary power supply winding different name termination of high frequency transformer T1.
Control to use MIP0040MS as control chip with protection circuit, there are 7 pins: OUT pin is electric with switching tube
The resistance RGT1 and diode DGT1 on road connects；VIN pin is connected with the input winding different name end of high frequency transformer T1；VCC draws
Foot connects the auxiliary power supply Motor Winding Same Name of Ends of high frequency transformer T1；The junction point of TR pin connecting resistance RTR1 and RTR2, and and electric capacity
CTR series connection is followed by primary ground；The junction point of VDD pin connecting resistance RVDD2 and RVDD1；GND pin connects primary ground；IS pin leads to
Cross resistance RIS1 and connect metal-oxide-semiconductor S pole, and the circuit consisted of resistance RIS2 and electric capacity CIS parallel connection connects primary ground.
In first output circuit, the first output Motor Winding Same Name of Ends of high frequency transformer T1 connects diode DOUT1 anode；Electrolysis
Electric capacity COUT1 positive pole connects diode DOUT1 negative electrode, and it is defeated that the filter circuit consisted of inductance Lfil1 and electric capacity Cfil1 connects first
Go out end；COUT1 negative pole connects the first output winding different name end of high frequency transformer T1 as the first output ground.
In second output circuit, the second output Motor Winding Same Name of Ends of high frequency transformer T1 connects diode DOUT2 anode；Electrolysis
Electric capacity COUT2 positive pole connects diode DOUT2 negative electrode, and it is defeated that the filter circuit consisted of inductance Lfil2 and electric capacity Cfil2 connects second
Go out end；COUT2 negative pole connects the second output winding different name end of high frequency transformer T1 as the second output ground.
Detailed operation principle is analyzed below in conjunction with Fig. 3:
Fig. 3 is waveform during circuit stability work, is arranged above metal-oxide-semiconductor DS waveform, and lower section is control chip TR pin waveform.Circuit
During initial power-on, metal-oxide-semiconductor is off state, and the high voltage direct current that control chip is provided by input rectifying filter circuit is through VIN
Pin powered, makes control chip start working.Now control chip TR pin detects that auxiliary power supply winding voltage is less than 65mV,
Opening signal through OUT pin to metal-oxide-semiconductor transmission, the input winding of high frequency transformer T1 has electric current to pass through, and energy storage is in input
In the inductance of side.After certain time, control chip OUT pin sends cut-off signals to metal-oxide-semiconductor, and thermal energy storage process terminates, input
Winding current is transferred to electric capacity CDS by metal-oxide-semiconductor and charges it, and enters the energy release stage.Discharging the stage at energy, high frequency becomes
Commutation diode DOUT1, DOUT2, DVCC of depressor T1 tri-output winding begin to turn on, and are stored in high frequency transformer T1
Energy is discharged in output storage capacitor COUT1, COUT2, CVCC2.When exporting winding current and dropping to zero, energy release knot
Bundle, resonance starts.The resonance circuit of the input winding inductance composition of electric capacity CDS and high frequency transformer T starts concussion, when arrival
During one half shaking the cycle, metal-oxide-semiconductor DS voltage reaches valley point, and TR pin detects the 3rd output Motor Winding Same Name of Ends electricity simultaneously
Pressure drops to 65mV, and at this moment control chip OUT pin sends to metal-oxide-semiconductor and opens signal, is again introduced into thermal energy storage process, and achieves
" no-voltage is open-minded ", reduces metal-oxide-semiconductor turn-on consumption.
Voltage Feedback principle: the second output winding of high frequency transformer T1 is connected with voltage feedback circuit, it is achieved output electricity
The feedback adjustment of pressure.Output voltage produces electric current via current-limiting resistance RPC, flows through the former limit of optocoupler PC.Along with change in voltage, optocoupler
Secondary current respective change, produces corresponding feedback voltage at control chip VDD pin, it is achieved Voltage Feedback function.
Current feedback principle: current feedback function realizes at high frequency transformer T1 input side winding.It is connected on high frequency transformation
Current sampling resistor Rs in device T1 input winding loop produces sampled voltage, and is delivered to control chip through current-limiting resistance RIS1
IS pin, when input winding loop electric current is excessive, and the sampled voltage of generation exceedes setting value, then overcurrent protection generation action.
Above content is to combine concrete a kind of embodiment further description made for the present invention, it is impossible to assert
Being embodied as of the present invention is only limited to these explanations.For those of ordinary skill in the field, on described above basis
On can also make the change of some multi-forms, all should be considered as belonging to protection scope of the present invention.
Claims (7)
1. the input of wide scope, the flyback power supply of Multiple isolated outputs, it is characterised in that this flyback power supply at least wraps
Include:
High frequency transformer, rectifying and wave-filtering input circuit, switching tube circuit, output feedback circuit, control and protection circuit, first defeated
Going out circuit and the second output circuit, described rectifying and wave-filtering input circuit is by switching tube circuit and high frequency transformer inlet circuit
Connecting, described high frequency transformer two outfan is connected with the first output circuit, the second output circuit respectively, described second output electricity
Road is connected with switching tube circuit with protection circuit by output feedback circuit, control.
A kind of wide scope input the most according to claim 1, the flyback power supply of Multiple isolated outputs, it is characterised in that:
Described high frequency transformer has input winding, the first output winding, the second output winding, auxiliary power supply winding；
Described rectifying and wave-filtering input circuit has input filter device and full-bridge rectifier filter device；
Described switching tube circuit has DCR absorption circuit and metal-oxide-semiconductor drive circuit；
Described output feedback circuit has voltage references and light-coupled isolation feedback device；
Described control and protection circuit have power supply control chip, over-current detection circuit；
Described first output circuit has the first current rectifying and wave filtering circuit, the first absorption circuit；
Described second output circuit has the second current rectifying and wave filtering circuit, the second absorption circuit.
A kind of wide scope input the most according to claim 2, the flyback power supply of Multiple isolated outputs, it is characterised in that:
Described rectifying and wave-filtering input circuit and described switching tube circuit connect and compose series circuit to the input of described high frequency transformer around
Group power supply energy storage.
A kind of wide scope input the most according to claim 2, the flyback power supply of Multiple isolated outputs, it is characterised in that:
The voltage references of described output feedback circuit is TL431, light-coupled isolation feedback device is TLP781.
A kind of wide scope input the most according to claim 2, the flyback power supply of Multiple isolated outputs, it is characterised in that:
Described control is MIP0040MS with the power supply control chip of protection circuit, and described over-current detection circuit passes through sampling resistor by institute
State high frequency transformer input winding current signal and be transferred to described power supply control chip.
A kind of wide scope input the most according to claim 2, the flyback power supply of Multiple isolated outputs, it is characterised in that:
Described first output circuit exports winding with described high frequency transformer first and is connected.
A kind of wide scope input the most according to claim 2, the flyback power supply of Multiple isolated outputs, it is characterised in that:
Described second output circuit is connected with the second of described high frequency transformer the output winding and described output feedback circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610551674.XA CN106100378A (en) | 2016-07-11 | 2016-07-11 | A kind of wide scope input, the flyback power supply of Multiple isolated outputs |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610551674.XA CN106100378A (en) | 2016-07-11 | 2016-07-11 | A kind of wide scope input, the flyback power supply of Multiple isolated outputs |
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| CN106100378A true CN106100378A (en) | 2016-11-09 |
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| CN201610551674.XA Pending CN106100378A (en) | 2016-07-11 | 2016-07-11 | A kind of wide scope input, the flyback power supply of Multiple isolated outputs |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505879A (en) * | 2016-12-19 | 2017-03-15 | 江苏省瑞宝特科技发展有限公司 | Internet of Things intelligent comprehensive supply unit |
| CN106686827A (en) * | 2017-02-10 | 2017-05-17 | 深圳创维照明电器有限公司 | LED lamp and wide-voltage input driving circuit thereof |
| CN107846060A (en) * | 2017-11-22 | 2018-03-27 | 深圳市助尔达电子科技有限公司 | A kind of power charging circuit |
| CN107888054A (en) * | 2017-11-20 | 2018-04-06 | 山东超越数控电子股份有限公司 | A kind of design method of multichannel isolation circuit output driving power supply |
| CN109167534A (en) * | 2018-09-26 | 2019-01-08 | 上海雷诺尔科技股份有限公司 | A kind of mesohigh solid state motor soft starter high-frequency isolation power supply circuit |
| CN110635702A (en) * | 2019-11-08 | 2019-12-31 | 苏州力生美半导体有限公司 | High-precision multi-output flyback switching power supply circuit and method |
| CN117394292A (en) * | 2023-10-18 | 2024-01-12 | 广州市嘉州科技有限公司 | Overcurrent protection circuit based on adjustable constant current voltage stabilizer CCR |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505879A (en) * | 2016-12-19 | 2017-03-15 | 江苏省瑞宝特科技发展有限公司 | Internet of Things intelligent comprehensive supply unit |
| CN106505879B (en) * | 2016-12-19 | 2019-12-10 | 江苏省瑞宝特科技发展有限公司 | intelligent integrated power supply device of Internet of things |
| CN106686827A (en) * | 2017-02-10 | 2017-05-17 | 深圳创维照明电器有限公司 | LED lamp and wide-voltage input driving circuit thereof |
| CN107888054A (en) * | 2017-11-20 | 2018-04-06 | 山东超越数控电子股份有限公司 | A kind of design method of multichannel isolation circuit output driving power supply |
| CN107846060A (en) * | 2017-11-22 | 2018-03-27 | 深圳市助尔达电子科技有限公司 | A kind of power charging circuit |
| CN109167534A (en) * | 2018-09-26 | 2019-01-08 | 上海雷诺尔科技股份有限公司 | A kind of mesohigh solid state motor soft starter high-frequency isolation power supply circuit |
| CN110635702A (en) * | 2019-11-08 | 2019-12-31 | 苏州力生美半导体有限公司 | High-precision multi-output flyback switching power supply circuit and method |
| CN117394292A (en) * | 2023-10-18 | 2024-01-12 | 广州市嘉州科技有限公司 | Overcurrent protection circuit based on adjustable constant current voltage stabilizer CCR |
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Application publication date: 20161109 |
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